PDF malware analysis — malicious · 95c32348b87d06d1

MALICIOUS

PDF

75.6 KB Created: 2021-09-25 04:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 46bad7b3915b4dc979590ff22e3a9d40 SHA-1: 0de8fba6b76345e0ff28b98889103fbb56934ee9 SHA-256: 95c32348b87d06d1e5fd0ddf4af2d6f3f9320af52da615a59b42908cc269365a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://philabc.ru/uplcv?utm_term=android+wecker+ausschalten PDF link annotation
- http://www.scea.edu.mn/ckfinder/userfiles/files/fuvajirizere.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/pamubetijefi.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/27668621931.pdfIn PDF document text
- https://holyfamilyhospitals.com/ckfinder/userfiles/files/penulut.pdfIn PDF document text
- http://advocaatindex.nl/images/uploads/95266102086.pdfIn PDF document text
- http://suitianhose.com/uploadfile/files/77886867327.pdfIn PDF document text
- https://robustbrakes.com/administrator/imagetemp/file/vevefilubaxotirenoja.pdfIn PDF document text
- https://podgoricki-klub.me/userfiles/file/17126162877.pdfIn PDF document text
- https://fallsplat.se/bildbank/file/pejuzekerixoxipimanefusit.pdfIn PDF document text
- http://sangjeom.com/userfiles/file///8061911335.pdfIn PDF document text
- http://brbud.pl/userfiles/file/nebokodugujekevi.pdfIn PDF document text
- http://sasmedm.com/www/js/ckfinder/userfiles/files/boforodo.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/b30d81683f26169a988dcd138adf884a/50003381794.pdfIn PDF document text
- https://virker-ikke.dk/files/12068640202.pdfIn PDF document text
- http://dulichtantai.com/files/uploaded/files/76309374760.pdfIn PDF document text
- http://koreaseals.com/ckfinder/userfiles/files/kadexovanopodidigejunafis.pdfIn PDF document text
- http://siamintertrade.com/file_media/file_image/file/81738216599.pdfIn PDF document text
- https://ostrichtours.com/ckfinder/userfiles/files/18755238342.pdfIn PDF document text
- http://wolfroccatiassociati.it/userfiles/files/mavesisozekamajogopive.pdfIn PDF document text
- http://ecompletecontact.com/ckfinder/userfiles/files/xapunozonafosase.pdfIn PDF document text
- http://shannonlakeestates.org/fck_images/file/wafutenetowekelolidugiri.pdfIn PDF document text
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/0617210301609b541eaedf5e0c92eb44/jowibewuxuxuro.pdfIn PDF document text
- http://sergeybazarov.ru/file/4236525158.pdfIn PDF document text
- https://habrit.tw/ckfinder/userfiles/files/tolasanefojane.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEC3	19244 bytes
SHA-256: `eb5e307e1d6c2674052e1fa9da53a03fd7d4e511c6ec23f6977a7abaeb56d2e9`
`font_01_sfnt_off0000f015.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF015	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001082c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1082C	10728 bytes
SHA-256: `7f6ca7c91fb8a65e9d807abb61a6de0cf642c2b839a83062eb7ab945b1c0c30f`

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